Previously, he was general manager of Ad Platforms & Global Exchange at Yahoo, where he oversaw the company’s advertising platforms business including the Right Media Exchange and APT by Yahoo, Yahoo’s intelligent media planning and buying platform.

Bill joined Yahoo from his role as President of Right Media, which Yahoo acquired in 2007, bringing him on board and integrating Right Media’s Exchange as the solution for Yahoo's entire non-guaranteed, spot market inventory.

Before leading Right Media, Bill was CEO of Didit, an independent search marketing firm, from 2005 to 2007. Immediately prior to Didit, he served as SVP, Products and strategy at Ask.com; he joined Ask when MaxOnline, of which he was CEO from 2002 - 2004, was acquired by Ask in 2004. Bill served at DoubleClick from 1997 – 2002, first as Director, Financial Planning and Investor Relations and then as VP/GM of DoubleClick Media.